Reinforcement of embankment at oil tank farm in Saldanha, South Africa
The new OTMS (Oil Tanking MOGS Saldanha) crude oil storage facility at the deep-water port of Saldanha, situated on the west coast of South Africa, is geographically well located between the Atlantic and the Indian Ocean to allow quick access to the markets in America, Europe and Asia via global shipping routes.
Once completed, the tank farm will consist of twelve underground crude oil storage tanks, which allow space for a total of 13.2 million barrels of oil. Each tank contains 192 No. of 17m high, continuously cast reinforced concrete columns to support the roof slab. A total quantity of 165,000m3 of concrete was needed during their construction. The total quantity of fill material required was 1,300,000m3. The size of the project equals 24 football fields.
The sides of the tanks consist of 9m high vertical retaining walls that rest on 8m high sloping embankments. To provide sufficient stability against the slope and -bearing failure under consideration of the high loads resulting from the concrete tank side walls together with the fill between adjacent walls, a safe solution was required to increase the stability of the embankment structures.